xlog test error

1/4 Test #717: xlog_test.XlogTest.xlogIf ....................***Failed 0.06 sec
Note: Google Test filter = XlogTest.xlogIf
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from XlogTest
[ RUN ] XlogTest.xlogIf
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:87: Failure
Expected equality of these values:
1
messages.size()
Which is: 0
[ FAILED ] XlogTest.xlogIf (0 ms)
[----------] 1 test from XlogTest (0 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (0 ms total)
[ PASSED ] 0 tests.
[ FAILED ] 1 test, listed below:
[ FAILED ] XlogTest.xlogIf

1 FAILED TEST

2/4 Test #718: xlog_test.XlogTest.xlog ......................***Failed 0.06 sec
Note: Google Test filter = XlogTest.xlog
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from XlogTest
[ RUN ] XlogTest.xlog
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:152: Failure
Expected equality of these values:
1
messages.size()
Which is: 0
[ FAILED ] XlogTest.xlog (0 ms)
[----------] 1 test from XlogTest (0 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (0 ms total)
[ PASSED ] 0 tests.
[ FAILED ] 1 test, listed below:
[ FAILED ] XlogTest.xlog

1 FAILED TEST

3/4 Test #721: xlog_test.XlogTest.rateLimitingEndOfThread ...***Failed 0.07 sec
Note: Google Test filter = XlogTest.rateLimitingEndOfThread
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from XlogTest
[ RUN ] XlogTest.rateLimitingEndOfThread
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:492: Failure
Value of: handler->getMessageValues()
Expected: has 12 elements where
element #0 is equal to "msg 0",
element #1 is equal to "msg 7",
element #2 is equal to "msg 14",
element #3 is equal to "msg 21",
element #4 is equal to "msg 28",
element #5 is equal to "msg 35",
element #6 is equal to "msg 42",
element #7 is equal to "msg 49",
element #8 is equal to "dtor 100",
element #9 is equal to "dtor 101",
element #10 is equal to "dtor 102",
element #11 is equal to "dtor 103"
Actual: {}
[ FAILED ] XlogTest.rateLimitingEndOfThread (0 ms)
[----------] 1 test from XlogTest (0 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (0 ms total)
[ PASSED ] 0 tests.
[ FAILED ] 1 test, listed below:
[ FAILED ] XlogTest.rateLimitingEndOfThread

1 FAILED TEST

4/4 Test #720: xlog_test.XlogTest.rateLimiting ..............***Failed 0.18 sec
Note: Google Test filter = XlogTest.rateLimiting
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from XlogTest
[ RUN ] XlogTest.rateLimiting
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:297: Failure
Value of: handler->getMessageValues()
Expected: has 8 elements where
element #0 is equal to "msg 0",
element #1 is equal to "msg 7",
element #2 is equal to "msg 14",
element #3 is equal to "msg 21",
element #4 is equal to "msg 28",
element #5 is equal to "msg 35",
element #6 is equal to "msg 42",
element #7 is equal to "msg 49"
Actual: {}
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:306: Failure
Value of: handler->getMessageValues()
Expected: has 7 elements where
element #0 is equal to "msg 0",
element #1 is equal to "msg 8",
element #2 is equal to "msg 16",
element #3 is equal to "msg 24",
element #4 is equal to "msg 32",
element #5 is equal to "msg 40",
element #6 is equal to "msg 48"
Actual: {}
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:316: Failure
Value of: handler->getMessageValues()
Expected: has 4 elements where
element #0 is equal to "msg 0",
element #1 is equal to "msg 14",
element #2 is equal to "msg 28",
element #3 is equal to "msg 42"
Actual: {}
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:325: Failure
Value of: handler->getMessageValues()
Expected: has 7 elements where
element #0 is equal to "msg 0",
element #1 is equal to "msg 8",
element #2 is equal to "msg 16",
element #3 is equal to "msg 24",
element #4 is equal to "msg 32",
element #5 is equal to "msg 40",
element #6 is equal to "msg 48"
Actual: {}
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:342: Failure
Value of: handler->getMessageValues()
Expected: has 8 elements where
element #0 is equal to "msg 0",
element #1 is equal to "msg 7",
element #2 is equal to "msg 14",
element #3 is equal to "msg 21",
element #4 is equal to "msg 28",
element #5 is equal to "msg 35",
element #6 is equal to "msg 42",
element #7 is equal to "msg 49"
Actual: {}
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:351: Failure
Value of: handler->getMessageValues()
Expected: has 7 elements where
element #0 is equal to "msg 0",
element #1 is equal to "msg 8",
element #2 is equal to "msg 16",
element #3 is equal to "msg 24",
element #4 is equal to "msg 32",
element #5 is equal to "msg 40",
element #6 is equal to "msg 48"
Actual: {}
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:368: Failure
Value of: handler->getMessageValues()
Expected: has 8 elements where
element #0 is equal to "msg 0",
element #1 is equal to "msg 7",
element #2 is equal to "msg 14",
element #3 is equal to "msg 21",
element #4 is equal to "msg 28",
element #5 is equal to "msg 35",
element #6 is equal to "msg 42",
element #7 is equal to "msg 49"
Actual: {}
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:377: Failure
Value of: handler->getMessageValues()
Expected: has 7 elements where
element #0 is equal to "msg 0",
element #1 is equal to "msg 8",
element #2 is equal to "msg 16",
element #3 is equal to "msg 24",
element #4 is equal to "msg 32",
element #5 is equal to "msg 40",
element #6 is equal to "msg 48"
Actual: {}
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:434: Failure
Value of: handler->getMessageValues()
Expected: has 21 elements where
element #0 is equal to "int arg 0",
element #1 is equal to "ms arg 0",
element #2 is equal to "s arg 0",
element #3 is equal to "s arg capture 0",
element #4 is equal to "fmt arg 0",
element #5 is equal to "fmt ms arg 0",
element #6 is equal to "2x int arg 0",
element #7 is equal to "1x ms arg 0",
element #8 is equal to "3x s arg 0",
element #9 is equal to "2x int arg 1",
element #10 is equal to "3x s arg 1",
element #11 is equal to "3x s arg 2",
element #12 is equal to "int arg conditional 2",
element #13 is equal to "int arg 6",
element #14 is equal to "ms arg 6",
element #15 is equal to "fmt arg 6",
element #16 is equal to "fmt ms arg 6",
element #17 is equal to "2x int arg 6",
element #18 is equal to "1x ms arg 6",
element #19 is equal to "int arg conditional 6",
element #20 is equal to "2x int arg 7"
Actual: {}
/Users/zhangshuo/work/folly/folly/logging/test/XlogTest.cpp:448: Failure
Value of: handler->getMessageValues()
Expected: has 4 elements where
element #0 is equal to "bah 0",
element #1 is equal to "bah 1",
element #2 is equal to "bah 2",
element #3 is equal to "bah 3"
Actual: {}
[ FAILED ] XlogTest.rateLimiting (114 ms)
[----------] 1 test from XlogTest (114 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (114 ms total)
[ PASSED ] 0 tests.
[ FAILED ] 1 test, listed below:
[ FAILED ] XlogTest.rateLimiting

1 FAILED TEST

0% tests passed, 4 tests failed out of 4

Total Test time (real) = 6.97 sec

The following tests FAILED:
717 - xlog_test.XlogTest.xlogIf (Failed)
718 - xlog_test.XlogTest.xlog (Failed)
720 - xlog_test.XlogTest.rateLimiting (Failed)
721 - xlog_test.XlogTest.rateLimitingEndOfThread (Failed)
Errors while running CTest

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is this a bug?